Weighing or measuring apparatus.



UNITED STATES CARL NAGEL, OF GLIESMARODE, BRUNSWICK, GERMANY.

WEIGHING- OB MEASURING APPARATUS.

Specification of Letters Patent.

Patented Apr. 7, 1914.

Application filed July 16, 1913. Serial No; 779,353.

To all whom it may concern:

Be it known that I, CARL. NAGEL, owner of a manufactory, citizen of theDuchy of Brunswick, Empire of Germany, residing at Gliesmarode,Brunswick, Germany, have invented certain new and useful Improvements inWeighing or Measuring Apparatus, of which the following is aspecification.

My invention relates to improvements in weighing or measuring apparatus,and more particularly in apparatus for taking samples from weighing ormeasuring receptacles which are adapted to be opened by valves or thelike.

The object of the improvements is to provide an apparatus by means ofwhich samples of liquids can automatically be taken from suchreceptacles.

\Vith this object in view my invention consists in so connecting ameasuring member provided on the weighing or measuring receptacle withthe valve or closing member of the receptacle, that during the fillingperiod the said measuring member communicates with the receptacle and isautomatically disconnected from the receptacle and emptied after theclosing member has been brought into open position.

Furthermore my invention consists in providing a measuring member whichis considerably narrower at its top end than at its bottom end, in orderthat in such cases in which the receptacle is filled to different levelsthe volumes of the samples taken from the receptacles are but slightlydifferent.

In order that the capacity of the measuring member can be varied I mountthe narrow part of the measuring memberon a closing disk in the form ofa piston which is adjustable within the measuring member.

For the purpose of explaining the invention a structural embodiment ofthe same has been shown in the accompanying drawings in which the sameletters of reference have been used in all the views to indicatecorresponding parts. I

In said drawings Figure 1, is a side view of an apparatus embodying theinvention partly in section. Figs. 2 and 8, are vertical cross-sectionsof a cockvalve, showing the cock in different positions.

Before describing those parts to which my invention more particularlyrelates I shall first describe a liquid weighing apparatus in which myinvention is preferably embodied.

Referring to Fig. 1, a stationary frame 1 1s provlded with a pair ofbrackets 5 disposed at the rear of the frame 1 and equipped with bearingplates 2. On the said bearing plates a weighing beam 4 is supported bymeans of an edged bearing block At one of its ends, and in the exampleshown in the figure at the left hand end, the said beam is bifurcated,and on this bifurcated end a receptacle 8 is suspended by means of edgebearings 6, 7. On an edge bearing 9, 10 provided at the opposite end ofthe beam a scale 1l for the weights is supported. The receptacle 8 isdesigned for receiving the liquid to be weighed, and it is provided witha partition wall 16 in which is a discharge valve 17. The liquid to beweighed is supplied from a vessel 14:

equipped-with an overflow 13 and an admission pipe 12. The vessel 14 issecured to the frame 1 by means of a flange l5, and its bottom isequipped with two discharge valves 18 and '19 of different sizes. Thesevalves which in the figure have been shown in open position aresuspended from arms 20 and 21 which are secured internally of the vessel14 to horizontal shafts 22 and 23. Outside the vessel the shafts areequipped with le vers 2i and 25 respectively. The lever 25 which belongsto the larger valve 19 bears on an abutment 26 connected with themeasuring receptacle 8. In the construction shown in the figure the saidabutment is in the form of a roller. The lever 2a which belongs to thesmaller valve 18 bears on a nose 27 of the lever 25, so that both valvesare opened by means of the abutment 26 when the measuring receptacle 8is lifted. When the measuring receptacle 8 has been filled and movesdownward, at first only the large valve 19 must be moved into closingposition and the small one must for the present remain open, in orderthat the exact weight be discharged into the receptacle through thesmall valve, as is known in automatic weighing machines. To effect this,an arm 24; on the lever 24 extends beyond its fulcrum 22. hen the valve18 moves into open position, the arm 24- is caught by a pawl 28 which isheld in operative position by an arm 29 having a rocking support on theframe 1. A rearward extension 29 of the said arm is disposed with itsend in the path of an abutment member 30 which rises together with theweight scale 11 and rocks the arm 29 at the end of the filling operationso as to release the pawl 28 and to permit the valve 18 to be seated bygravity. The parts have such dimensions, that the large valve 19 whichcontrols the main filling operation of the receptacle 8 is seated afterthe first part of the upward movement of the scale 11, while the smallvalve 18 which controls the exact filling operation is closed when theexact weight of the liquid has been obtained.

The discharge valve 17 of the measuring receptacle 8 is eqi'iipped witha valve stem 32 which is guided for example in a bridge member 31 and issuspended from a horizontal rock shaft located within the receptacle 8by means of a link 33 and a crank 3 1. Therefore the discharge valve 17can be opened and closed by turning the shaft 35. In the constructionshown in the drawings the valve 17 is opened by turning the shaft 35 tothe left. A weighted lever 36 connected with the shaft 35 and providedto balance the unweighted valve 17 and its gearing 32, 33, 34: preventsthe shaft 35 r from being turned to the left during the fillingoperation. In the position of the parts shown in Fig. 1 the crank 34 towhich the link 33 is connected is in its neutral position, so that theweighted valve 17 can not accidentally be opened. As soon as thereceptacle 8 has been filled exactly to the desired weight, and thelever 24 which controls the small valve 18 drops, a rocking lever 37connected with the lever 24: by a rod 38 strikes against the crank 34 oran extension 33 of the link 33, whereby the opening movement of theshaft 35 is started. Thereupon the valve 17 which 18 now loaded by theliquid within the receptacle effects the further movement of the shaft35 and thereby the opening of the receptacle 8. The lever 2 1 carries asubsidiary weight 39 which is provided to increase the blow of the lever37 and thereby to assure the open ing movement of the valve 17. If thelever 37 is mounted 011 the receptacle 8 a clearance 38 may be providedbetween the lever 37 and the rod 38, in order that during the first partof the downward movement of the receptacle 8 the lever 37 does notaffect the extension 33 or the valve 18.

In order that the valve 17 after being opened can not be prematurelyclosed as the load of the liquid bearing thereon is gradually dischargedand under the action of the weighted lever 36, the following mechanismis provided: Below the partition wall 16 a capacious vessel 40 isprovided within the receptacle 8 which is adapted to rock about alateral axis 41, and is normally held in horizontal position by suitablemeans such as a counterweight 1-2. The bottom of the said vessel isformed with an opening 43 which is so small that the vessel 40 can beemptied but slowly when it is vessel 40 is being tilted downward.

being filled from the receptacle 8 with the valve 17 in open position.The load of liquid within the vessel 40 is in excess of thecounterweight 42 and rocks the vessel about its axis 41, and in thisposition the vessel is held during the whole discharging operation ofthe receptacle. The vessel is connected by a link 61 with a lever 44:which operates a pawl 46 through the agency of a link 45. The said pawlis so mounted on the receptacle 8 that when the vessel 40 is beingtilted it engages a nose 47 on the valve stem 32 which has before beenshifted downward, so that the valve 17 is locked in its open position.Only at the end of the discharge and when the vessel 10 after beingemptied again is rocked upward, the valve is again released, whereuponthe weighted lever 36 closes the valve 17. The

spout 8 of the receptacle 8 may be arranged above a collectingtank, orit may be connected through a suitable pipe with the place of use.

As the scale 11 which carries the weights lifts the empty receptacle 8into its elevated position shown in Fig. 1 and reopens the inlet valves18 and 19 by means of the abutment roller 26 provided on the receptacle8, a locking member must be provided by means of which the receptacle 8is held in its lower position until it has been completely emptied.Locking members of this kind are well known in automatic weighingmachines. To show what may be done, the shaft 16 of the pawl 16 isprovided with a hook 48 which engages below a book 19 secured to theframe 1 as soon as the receptacle 8 has reached its lower position andthe Thereby the receptacle 8 is held in its lower posi tion, until thevessel has been rocked into its normal position.

The weighing apparatus may be provided with a counting mechanism 50which is adapted to be operated for example from the valve lever 2% bymeans of a rod 51. All the parts of the weighing apparatus may beinclosed within a casing, in which case only the counting mechanism 50is visible.

Referring now to those parts to which my invention more particularlyrelates, I wish it to be understood, that the weighing apparatusdescribed above has been chosen merely as an example to explain themanner of putting my invention into practice, and that it may beembodied in apparatus of a different type. The receptacle 8 is equippedwith a measuring member 52, here shown as a pipe which is connectedtherewith by a pipe 53. The pipe 53 is equipped with a two-way cock 5 1which is adapted to alternately connect the measuring pipe 52 with thereceptacle 8 and a discharge pipe 58, and which is pro vided with anoperating arm 55. The latter is connected by a link 56 with a crank arm57 secured to the shaft 35, so that the cock is adapted to be shifted bythe rotation of the shaft 35. The arrangement is such that during thefilling operation of the receptacle 8 the cock 54 throws the pipe 52into communication with the receptacle 8 (Fig. 2), so that the said pipeis filled, and that during the emptying operation, that is while thevalve 17 of the receptacle 8 is in open position, the cock disconnectsthe measuring pipe 52 from the receptacle 8 and connects the same withthe discharging pipe 58, as is shown in Fig. 3. Therefore a sample canbe taken from each charge of the receptacle. If this is not done, thecontents of the measuring pipe 52 flow through the discharge pipe 58 tothe main part of the filling charge which flows from the spout 8.

If the level of the liquid contained in the receptacle 8 is not alwaysthe same, as may be the case if liquids of different specific gravityare measured, and it is desirable that the amount of the samples takenfrom the weighing receptacle be the same or nearly the same, the upperpart of the measuring pipe 52 is made with a comparatively smallcross-section, and preferably it is made in the form of a capillarytube. In the construction shown in Fig. 1 a thin tube 60 is fitted intothe upper part of the measuring pipe 52 by means of a disk 59 which isadapted to be shifted in the manner of a plunger. This construction isadvantageous also in this respect, that the contents of the measuringpipe can be regulated by shifting the piston 59 which is provided withthe capillary tube, upward or downward within the measuring pipe 52.

I claim herein as my invention:

1. In an apparatus for measuring liquids, the combination with areceptacle adapted to receive the liquid, a valve to discharge theliquid from said receptacle and means for opening said valve, of atubular measuring member communicating with said receptacle, andautomatic means controlled by the valve opening means to disconnect themeasuring member from the receptacle and to open the same.

2. In an apparatus for measuring liquids, the combination with areceptacle adapted to receive the liquid, a valve to discharge theliquid from said receptacle and means for opening said valve, ofmeasuring means providing a measuring chamber communicating with saidreceptacle, the upper portion of said chamber being reduced as comparedto the main portion, and automatic means controlled by the valve openingmeans to disconnect the measuring chamber from the receptacle and toopen the same.

3. In an apparatus for measuring liquids, the combination with areceptacle adapted to receive the liquid, a valve to discharge theliquid from said receptacle and means for opening said valve, of atubular measuring member communicating with said receptacle, adjustablemeans within said member for varying the capacity thereof, and automaticmeans controlled by the valve opening means to disconnect the measuringmember from the receptacle and to open the same.

4. In an apparatus for measuring liquids, the combination with areceptacle adapted to receive the liquid, a valve to discharge theliquid from said receptacle and means for opening said valve, ofmeasuring means providing a measuring chamber communicating with saidreceptacle, the upper portion of said chamber being reduced as comparedto the main portion, means within said chamber for varying the capacitythereof, and automatic means controlled by the valve opening means todisconnect the measuring member from the receptacle and to open thesame.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

CARL NAGEL.

WVitnesses:

WILHELM: LEHRKE, JULIUS SECKEL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G. .i .i

